diff mbox series

[v4,13/14] fork: Move thread_stack_free_rcu to call_rcu_lazy

Message ID 20220819204857.3066329-14-joel@joelfernandes.org (mailing list archive)
State Superseded
Headers show
Series Implement call_rcu_lazy() and miscellaneous fixes | expand

Commit Message

Joel Fernandes Aug. 19, 2022, 8:48 p.m. UTC 
This is required to prevent callbacks triggering RCU machinery too
quickly and too often, which adds more power to the system.

Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
---
 kernel/fork.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/kernel/fork.c b/kernel/fork.c
index c9a2e19d67e5..a4535cf5446f 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -227,7 +227,7 @@  static void thread_stack_delayed_free(struct task_struct *tsk)
 	struct vm_stack *vm_stack = tsk->stack;
 
 	vm_stack->stack_vm_area = tsk->stack_vm_area;
-	call_rcu(&vm_stack->rcu, thread_stack_free_rcu);
+	call_rcu_lazy(&vm_stack->rcu, thread_stack_free_rcu);
 }
 
 static int free_vm_stack_cache(unsigned int cpu)
@@ -354,7 +354,7 @@  static void thread_stack_delayed_free(struct task_struct *tsk)
 {
 	struct rcu_head *rh = tsk->stack;
 
-	call_rcu(rh, thread_stack_free_rcu);
+	call_rcu_lazy(rh, thread_stack_free_rcu);
 }
 
 static int alloc_thread_stack_node(struct task_struct *tsk, int node)
@@ -389,7 +389,7 @@  static void thread_stack_delayed_free(struct task_struct *tsk)
 {
 	struct rcu_head *rh = tsk->stack;
 
-	call_rcu(rh, thread_stack_free_rcu);
+	call_rcu_lazy(rh, thread_stack_free_rcu);
 }
 
 static int alloc_thread_stack_node(struct task_struct *tsk, int node)